Question about Python extension for LIbreOffice

Running LibreOffice v5 on Windows 7 Pro

Where do I find a Python extension for LibreOffice ? I have searched this forum but not found any link to the extension.

Where can I find documentation explaining how to use the Python extension with LibreOffice ?

Thank you.

python is not only a Extension.
python is an programming-language.
LO comes with python out of the box (respectivly on several OS LO-python is linked to the python-stack from the OS)

What exactly is the background for asking?
Python is, as karolus said a programming language and not an extension as such.
Are you looking for examples or any specific functionality ?

An example is http://extensions.libreoffice.org/extension-center/instant-word-count (not sure if it works in version 5 but it shows the concept.